2) "Task related to my project has been changed" subscription notifies users that any task related to their project has been changed:

3) "Appointment related to my project has been changed" subscription notifies users in case any appointment related to their project has been changed:

Note By default, both subscriptions "Task related to my project has been changed" and "Appointment related to my project has been changed" are inactive and grayed out. To activate them, open each subscription and check the Active option:

4) "Task Assignments Event"subscription notifies users of their new assignments:

5) Notify owner that task state has been changed subscription notifies Owner of task when another user (ex.: task executor) changes its State:

6) Notify assigned users that task has been unblocked subscription notifies user(s) assigned to task that its Predecessor is closed and task state is changed from ‘Blocked’ to a previous state (ex.: ‘Created’ or ‘In Progress’):